Battery

Abstract

The invention relates to a battery, in particular a lithium-ion type battery. The battery comprises a container (1) containing an electrochemical bundle with alternating positive and negative electrodes (2) framing electrolyte-impregnated separators, and at least one current output terminal (3, 4) forming a cover (3, 4) for closing the container (1). The edges (5, 6) of the electrodes (2) having one of the polarities are directly connected to the cover (3, 4) by welding.

1 - 22 . (canceled) 
     
     
         23 . A secondary cell comprising a container containing an electrode plate group having alternating positive and negative electrodes flanking separators impregnated with electrolyte, and at least one current output terminal forming a closure member closing off the container, wherein edge portions of the electrodes of one polarity are connected directly to said closure member by welding. 
     
     
         24 . The secondary cell according to  claim 23 , wherein the edge portions of the electrodes are compacted and form a connection portion of extra thickness which is welded directly to the closure member. 
     
     
         25 . The secondary cell according to  claim 23 , further comprising a hollow tube of central axis (A) about which the electrode plate group is wound, wherein the edge portions of the electrodes of the electrode plate group are distributed substantially evenly and circularly around said axis (A) near one end of said hollow tube. 
     
     
         26 . The secondary cell according to  claim 23 , further comprising a hollow tube having an axis (A) about which the electrode plate group is wound, and the closure member is provided at its center and on its face directed towards the interior of the container with an inner projection which fits into one end of the hollow tube. 
     
     
         27 . The secondary cell according to  claim 26 , wherein the inner projection forms an outer recess for connection at the outwardly directed face of the closure member of the container, so as to allow electrical connection with another secondary cell by cooperation of a male-female type with an external projection for connection disposed at a center of a closure member for closing the said other secondary cell container, at the face directed towards the outside of the container of the said other secondary cell. 
     
     
         28 . The secondary cell according to  claim 27 , wherein the outer recess for connection is threaded, so as to allow cooperation of a male-female screwed connection type by screwing an external threaded projection disposed at a center of the closure member for closing the container of the other secondary cell, on the face directed towards the outside of the container of the other secondary cell. 
     
     
         29 . The secondary cell according to  claim 23 , wherein the closure member is provided at its center and on its face directed towards the exterior of the container, with an external connecting projection, so as to allow electrical connection with another secondary cell by cooperation of a male-female type with an outer recess for connection disposed at the center of a closure member for closing the container of said other secondary cell, on the face directed towards the outside of the container of this other secondary cell. 
     
     
         30 . The secondary cell according to  claim 29 , wherein the outer projection for connection is threaded, so as to allow cooperation of a male-female type by screwing into a threaded outer recess for connection disposed at a center of the closure member for closing the container of the other secondary cell, on the face directed towards the outside of the container of this other secondary cell. 
     
     
         31 . The secondary cell according to  claim 23 , wherein the container comprises a film of electrically insulating material. 
     
     
         32 . The secondary cell according to  claim 31 , wherein the film is of flexible material, closed on itself by welding to form a flexible casing, within which an electrode plate group is disposed. 
     
     
         33 . The secondary cell according to  claim 31 , wherein the film is of plastics material. 
     
     
         34 . The secondary cell according to any one of  claim 33 , wherein the film is of polyester, polyethylene (PE), polypropylene (PP), or poly-ethylene terephthalate (PET). 
     
     
         35 . The secondary cell according to  claim 31 , wherein the film is of laminated material comprising at least a metal thin strip, inserted between two plastic thin strips. 
     
     
         36 . The secondary cell according to  claim 35 , wherein the metal thin strip is an aluminum thin strip. 
     
     
         37 . The secondary cell according to  claim 35 , wherein the plastic thin strips are made of polyester, polyethylene (PE), polypropylene (PP), or poly-ethylene terephthalate (PET). 
     
     
         38 . The secondary cell according to  claim 23 , wherein the container comprises an outer tube of electrically insulating, rigid or semi-rigid material. 
     
     
         39 . The secondary cell according to  claim 38 , wherein the plastic material of the outer tube is polypropylene (PP) or polyester (PE). 
     
     
         40 . The secondary cell according to  claim 32 , wherein the outer tube covers the flexible casing. 
     
     
         41 . The secondary cell according to  claim 32 , wherein the closure member of the container is crimped onto the outer tube or onto the flexible casing. 
     
     
         42 . The secondary cell according to  claim 32 , wherein the closure member of the container is bonded to the inner wall or the outer wall of the outer tube or of the flexible casing. 
     
     
         43 . The secondary cell according to  claim 32 , wherein the closure member of the container is welded to the inner wall or the outer wall of the outer tube or the flexible casing. 
     
     
         44 . The secondary cell according to  claim 32 , wherein the container comprises an outer filamentary reinforcement, wound around the flexible casing or the outer tube. 
     
     
         45 . The secondary cell according to  claim 44 , wherein the outer filamentary reinforcement is of plastic material. 
     
     
         46 . The secondary cell according to  claim 45 , wherein the outer filamentary reinforcement is a glass fiber-reinforced polyester film or tape. 
     
     
         47 . The secondary cell according to  claim 23 , wherein the electrode plate group is of the lithium-ion type. 
     
     
         48 . The secondary cell according to  claim 47 , wherein the positive electrodes are formed on an aluminum substrate, and the negative electrodes are formed on a copper substrate. 
     
     
         49 . The secondary cell according to  claim 47 , wherein the electrode plate group is of a lithium titanate oxide or LTO type. 
     
     
         50 . The secondary cell according to  claim 49 , wherein the positive and negative electrodes are formed on an aluminum substrate.